Gun head structure of 3D printer

Abstract

The utility model discloses a 3D printer gun head structure which comprises a heating block, a spray head assembled at the bottom of the heating block, a mounting cylinder and an air inlet fan, the mounting cylinder is assembled at the bottom of the heating block in an attached mode, a circular through groove is formed in the bottom of the mounting cylinder in a penetrating mode, and the end of the spray head is a conical part with the outer wall in attached contact with the side wall of the circular through groove. A pair of connecting ports communicated with the interior are formed in the side wall of the mounting cylinder, an air inlet pipe connected with one of the connecting ports is assembled on the air inlet fan, when temperature rise is needed, the air inlet fan is turned off, the air fluidity in the mounting cylinder is small, heat dissipation can be reduced, and therefore the heat preservation effect is achieved, and the temperature rise speed of the spray head is increased; when cooling is needed, the air inlet fan is started, air flow enters the mounting cylinder and can take away heat, and the cooling speed of the spray head is high.

Description

Technical Field

[0001] The utility model relates to the technical field related to 3D printers, and in particular to a gun head structure of a 3D printer. Background Art

[0002] A 3D printer is a rapid manufacturing device that creates three-dimensional objects by stacking materials layer by layer. It is widely used in product design, prototyping, and parts manufacturing, offering advantages such as efficiency, flexibility, and precision.

[0003] In the prior art, a fan is provided on the heating block and started when cooling is required to reduce the temperature of the heating block. Since the heat on the nozzle is transferred from the heating block, the temperature of the nozzle can also be reduced by reducing the temperature of the heating block. However, this method relies on heat transfer to affect the temperature of the nozzle, and the nozzle temperature decreases and heats up slowly. Therefore, it is necessary to design a 3D printer gun head structure. Utility Model Content

[0004] In view of the above technical problems, the purpose of the present invention is to overcome the problems of slow temperature reduction and heating speed of the nozzle in the prior art.

[0005] In order to achieve the above-mentioned objectives, the present invention provides a 3D printer gun head structure, comprising: a heating block, a nozzle mounted on the bottom of the heating block, a mounting tube fitted on the bottom of the heating block and having a circular through-slot extending through the bottom, and an intake fan, wherein the end of the nozzle is a tapered portion whose outer wall is in contact with the side wall of the circular through-slot, a pair of connection ports communicating with the interior are provided on the side wall of the mounting tube, and an intake pipe connected to one of the connection ports is provided on the intake fan.

[0006] Preferably, an air outlet pipe is connected to the connection port away from the air inlet pipe, and the air outlet pipe is arranged upward at a position away from the connection port.

[0007] Preferably, the position of the air outlet pipe away from the connection port is inclined toward the heating block.

[0008] Preferably, the mounting tube comprises a tube sleeve which is sleeved on the outside of the nozzle and fixedly connected to the heating block at one end by a plurality of mounting bolts, and a screw cap which is threadedly assembled on the outside of the tube sleeve, and a pair of connection ports are located on the screw cap.

[0009] Preferably, a polygonal protrusion is provided on the outer side wall of the rotary cover.

[0010] Preferably, a spring washer capable of interfering with the screw cap is sleeved on the outer side of the tube sleeve.

[0011] According to the above technical solution, the utility model provides a 3D printer gun head structure, which has the following beneficial effects during use: when heating is required, the air intake fan is turned off, and the air flow in the mounting barrel is small, which can reduce the dissipation of heat, thereby playing a heat preservation role and increasing the heating rate of the nozzle; when cooling is required, the air intake fan is started, and the air flow into the mounting barrel can take away the heat, and the nozzle cools down quickly.

[0012] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation methods; and the parts not involved in the present invention are the same as the existing technology or can be implemented by using the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 This is a three-dimensional structural diagram of a 3D printer gun head structure provided by this utility;

[0015] Figure 2 This is a 3D printer gun head structure provided by this utility Figure 1 Schematic diagram of the perspective along A;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of a 3D printer gun head structure provided by the present invention after removing the heating block;

[0017] Figure 4 This is a cross-sectional view of a mounting barrel of a 3D printer gun head structure provided by the present invention;

[0018] Figure 5 This is a schematic diagram of an exploded view of a mounting barrel of a 3D printer gun head structure provided by the present invention.

[0019] Description of Reference Numerals

[0020] 1. Nozzle; 2. Circular through-slot; 3. Mounting tube; 4. Inlet fan; 5. Inlet pipe; 6. Outlet pipe; 7. Pipe set; 8. Screw cap; 9. Multi-angle protrusion; 10. Spring washer; 11. Heating block. DETAILED DESCRIPTION

[0021] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0022] In the present invention, unless otherwise stated, directional words such as "upper, lower, inside, outside" contained in a term merely represent the orientation of the term in normal usage, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0023] like Figure 1-5 As shown, a 3D printer gun head structure includes: a heating block 11, a nozzle 1 assembled on the bottom of the heating block 11, a mounting tube 3 fitted on the bottom of the heating block 11 and having a circular through groove 2 extending through the bottom, and an intake fan 4. The end of the nozzle 1 is a tapered portion whose outer wall is in contact with the side wall of the circular through groove 2. A pair of connection ports communicating with the interior are provided on the side wall of the mounting tube 3. The intake fan 4 is equipped with an intake pipe 5 connected to one of the connection ports.

[0024] When the temperature needs to be raised, the air intake fan 4 is turned off, and the air mobility in the mounting tube 3 is small, which can reduce the heat dissipation and thus play a role in heat preservation; when the temperature needs to be lowered, the air intake fan 4 is started, and the air flow into the mounting tube 3 can take away the heat and reduce the temperature of the nozzle 1. This gun head structure makes it easy to control the temperature of the gun head and improve the heating and cooling speeds of the nozzle 1.

[0025] An air outlet pipe 6 is connected to the connection port away from the air inlet pipe 5 , and the air outlet pipe 6 is arranged upward at a position away from the connection port.

[0026] The polymer material becomes a fluid after being heated by the heating block 11 , and the other end of the gas outlet pipe 6 is arranged upward to prevent the exhausted gas from affecting the direction of the fluid ejected from the nozzle 1 .

[0027] The position of the air outlet pipe 6 away from the connection port is inclined toward the heating block 11 .

[0028] After the airflow takes away part of the heat from the nozzle 1 , the airflow will blow onto the heating block 11 , and can also cool the heating block 11 .

[0029] The mounting tube 3 includes a tube set 7 which is sleeved on the outside of the nozzle 1 and fixedly connected to the heating block 11 at one end by a plurality of mounting bolts, and a screw cap 8 which is threadedly assembled on the outside of the tube set 7 , and a pair of connection ports are located on the screw cap 8 .

[0030] When the nozzle 1 needs to be replaced, the air outlet pipe 6 and the air inlet pipe 5 are removed from the connection port, and then the screw cap 8 is loosened and removed, and the nozzle 1 can be replaced. The purpose of dividing the installation tube 3 into the pipe kit 7 and the screw cap 8 is to facilitate the replacement of the nozzle 1.

[0031] When the nozzle 1 is replaced, the position of the conical portion of the nozzle 1 will be different. By rotating the screw cap 8 , the inner wall of the circular through groove 2 can be tightly pressed against the conical portion of the nozzle 1 .

[0032] A polygonal protrusion 9 is provided on the outer side wall of the rotary cover 8 .

[0033] A wrench tool can be stuck on the polygonal protrusion 9 to facilitate tightening the screw cap 8 .

[0034] A spring washer 10 is sleeved on the outer side of the tube sleeve 7 and can interfere with the screw cover 8 .

[0035] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0036] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0037] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A 3D printer gun head structure, characterized in that: include: A heating block (11), a nozzle (1) mounted on the bottom of the heating block (11), a mounting tube (3) fitted on the bottom of the heating block (11) and having a circular through groove (2) extending through the bottom, and an air intake fan (4), wherein the end of the nozzle (1) is a conical portion whose outer wall is in contact with the side wall of the circular through groove (2), a pair of connection ports communicating with the interior are provided on the side wall of the mounting tube (3), and an air intake pipe (5) connected to one of the connection ports is mounted on the air intake fan (4).

2. A 3D printer gun head structure according to claim 1, characterized in that: An air outlet pipe (6) is connected to a connection port away from the air inlet pipe (5), and the air outlet pipe (6) is arranged upward at a position away from the connection port.

3. A 3D printer gun head structure according to claim 2, characterized in that: The position of the air outlet pipe (6) away from the connection port is inclined toward the heating block (11).

4. A 3D printer gun head structure according to claim 1, characterized in that: The mounting cylinder (3) comprises a tube assembly (7) which is sleeved on the outside of the nozzle (1) and fixedly connected to the heating block (11) at one end via a plurality of mounting bolts, and a screw cap (8) which is threadedly assembled on the outside of the tube assembly (7), with a pair of connection ports located on the screw cap (8).

5. A 3D printer gun head structure according to claim 4, characterized in that: A polygonal protrusion portion (9) is provided on the outer side wall of the rotary cover member (8).

6. A 3D printer gun head structure according to claim 4, characterized in that: The outer side of the tube sleeve (7) is sleeved with a spring washer (10) capable of contacting the screw cover (8).

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